Commonly Used Equations

Commonly used character code description
QCapacity HHead γ Sp.Gr η Efficiency N Speed
D Bore d Shaft Diameter P Horse Power Ha Atm g Gravitational
Hv Vapor Pressure Hs Suction Head Hf Head Lost v1 Upstream Speed v2 Downstream Speed

Hydro-Horse Power

Specific Speed

Horse Power

Suction Specific Speed

Torque

Velocity Head

Velocity

Net Positive Suction Head avarible

KW